Brake-shoe key-bolt.



N0. 743,793. PATENTED NOV. 10, 1903.

E. L. ADREON, JR. BRAKE s30 KEY BOLT.

APPLICATION FILED APE; 7, 1903.

N0 MODEL.

UNITED STATES V Patented November 10, 1903.

PATENT OFFICE.

EDNVARD L.'ADREON, JR, OF ST. LOUIS, MISSOURI.

BRAKE-SHOE KEY-BOLT.

SPECIFICATION forming part of Letters Patent No. 743,793, dated November 10, 1903.

Application filed April 7, 1903. Serial No. 151,548. (No model.)

T0 at whom it may concern:

Be it known that I, EDWARD L. ADREON, Jr., a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in Brake-Shoe Key-Bolts, of which the following is a specification containing a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof. i

My invention relates to improvementsin brake-shoe key-bolts; and it consists of the novel construction,combination, and arrangement of parts hereinafter shown, described, and claimed.-

In the drawings, Figure l is a side elevation of a brake-shoe head with a brake-shoe secured to the same, parts being broken away, showing my improved key-bolt in section. Fig. 2 is a side elevation. plan view.

The object of my invention is to construct a key-bolt which is adapted to hold the shoe to the brake-shoe head by a resilient engage ment-that is to say, the shoe is resiliently or yieldingly connected to the brake-shoe head.

Referring to the drawings, 1 indicates the brake-shoe, and 2 the brake-shoe head. The brake-shoe 1 is provided with the usual keybolt opening 3, said opening being provided with the usual tapering or. flaring walls 4:. The brake-shoe head 2 is provided with the usual holeor opening 5. 6 indicates my improved key-bolt, which is made of plate-steel rolled. Saidkeybolt 6 is cylindrical, as

shown, and is provided with a flaring or fun- Del-shaped portion 7, it being understood in this connection that the key is made out of a continuous or integral pieceof steel and when Fig. 3 is a top sitiou when they are bent inwardly on the inside of the bolt 6, as illustrated in Figs. 1 and 3. Said tongues 10 are resilient, and when the locking-key 12 is inserted in the lockingkey opening 9 the said spring-tongues 10 impinge or bear upon the locking-key 12.

It will be seen from the foregoing description and illustration that the bolt 6 is compressible-that is, the edges 8 may be drawn toward each other or they may be adjusted from each other.

When the key-bolt 6 is inserted in the opening in the brake-shoe and in the brake-shoe head or when it is used in an operative position, the special construction of the bolt 6 produces between the shoe and the brake-shoe head a resilient or yielding connection, which is very desirable in securing the brake-shoe to the brake-shoe head.

When the funnel-shaped portion 7 of the key-bolt 6 is drawn into the flaring walls 4 of the opening in the brake-shoe, it enough pressure is applied to said bolt 6 the edges 8 will be drawn together. The key 12 being inserted and impinging against the springtongues 10 will also producea yielding con nection.

The old-style brake-shoe key-bolts rigidly held the brake-shoe to the brake-shoe headthat is to say, by the use of the old-style brake-shoe key-bolt a rigid connection is produced between the brake-shoe and the brakeshoe head which is very. undesirable; and

the prime object of my invention is to pro- 'far as its position relative to the brake-shoe head is concerned. In the bolt which I have constructed not only the head or funnel shaped portion 7 is compressible and expansible, but the shank portion is also compressible and expansible.

I have shown and described my brake-shoe key-bolt having a resilient head, a resilient shank or stem, and a resilient key-seat for the locking-key 12. It is obvious that a certain amount of resiliency may be obtained by having the key-bolt provided with either aresilient head, shank, or key-seat. In other words, the key-bolt with a resilient head would effect a certain amount of resiliency, or a key-bolt with a resilient shankwould do likewise, or a key-bolt with a resilient keyseat would produce a certain amount of resiliency.

Having fully described my invention, what I claim as new, and desire to have-secured to me by the grant of Letters Patent, is

1. As an article of manufacture, a brakeshoe key-bolt having a resilicnthead portion and a locking-key opening provided with a resilient wall, substantially as specified.

2. As an article of manufacture, a brakeshoe key-bolt in the form of an open-seam tube and provided with a funnel-shaped resilient head and a lockinglzey opening provided with a resilient wall, substantially as specified.

3. As an article of manufacture, a brakeshoe key-bolt having a shank, a locking-key hole or seat, and a resilient head, substan EDW'ARD L. ADREON, JR.

Witnesses:

ALFRED A. EIoKs, JOHN C. HIGDON. 

